Definition of "collectable"

The mindset of making collectables runs against that of making games—if you succeed in the collectable department then there is a tendency to keep new players out and to drive old ones away because of escalating prices.

2006, Katie Salen Tekinbas, Eric Zimmerman, The Game Design Reader: A Rules of Play Anthology, page 551

If you invest in collectables overseas, you can make a profit or loss on currency exchange rates as well as a gain or loss on movements in intrinsic capital value.

2011, Charles Beelaerts, Investing in Collectables